Apparatus for cleanin air and other gases

ABSTRACT

532,863. Washing air. ARMSTRONG, J. J. V. (Wittemeier, H.). Feb. 16, 1939, No. 5054. [Class 55 (ii)] The air is fed through a pipe 2, and is distributed by a guide member 3 fitted with vanes 4 and partly immersed in a liquid bath 5. The air panes through a grating 9 to damp circular motion, a filter 8, a dead space 10, and escapes through a pipe 12. The vanes are held between guide plates 3a, 3b, the latter extending substantially across the liquid bath. In a modification the guide is conical in formation, and is placed above the surface of the liquid. U.S.A. Specification 2,004,467 is referred to.

Feb. 10, 1942. w. NEUMANN 2,272,995

APPARATUS FOR CLEANING AIR AND OTHER GASES Filed March 20, 1939 A F4 1 \Aa/ place from above downwards.

Patented Feb 10, 1942 APPARATUS FOR CLEANING AIR AND .OTHERGASES M Willy Neumann, Rollberg over Bernau, near Berlin, Germany V i Application March 20, 1939, Serial No. 263,027

In Germany December 14, 1 938 3 Claims; (01. 183- 8) The present invention relates to an apparatus for cleaning air and other gases, in which a liquid bath for washing the dusty air is arranged to the path of the dusty air through the purifier. Air purifiers which use a liquid bath forwashing the air are in themselves known. They work as follows:

The dust-containing. air, impinging with relatively great velocity on the liquid, on its path through the purifier, sets this liquid into wave motion. By its impact on the liquid surface, the air loses a part of the dust carried therewith, and

a further part is deposited by the air being compelled to' flow through a rain of spray of the liquid formed by its impact on the liquid. Often the sprayed liquid is led further into a filter layer, through which the air flows, in order to obtain as intimate a contact as possible between air and liquid. Plainly, this intimate contact between the air to be purified and the washing The present invention is specially suitable for bringing about such an intimate contact ina Figure 5 is again a partial plan of the guide member. I y

Figure 6 is a partial longitudinal section through a further form of the apparatus according to the invention,--and Figure 7 is a perspectiveview of further guiding vanes. I

The air to be purified is fed to the casing I through the conduit 2, which according to Fig ure '1, extends centrally into t'hecasing I from below. In contrast thereto in Figures 4 and 6, the arrangement isso chosen that this introductionpipe 2 for the dusty air, extends centrally from above downwards into the casing l.

Behind this introduction pipe 2 is positioned a stationary guide member 3', in the path of the dusty air. This has the function of so diverting the dusty air, fed into the apparatus ina vertical directiomthat it flows out in a horizontal direction into the casing l." The paths of flow of the air are shown in the drawing by arrows.

high degree and with very simple means.

According to the invention a stationary leading or guiding member, formed of sheet metal, and consisting of vanesfwhich wholly or partially dips into the liquid or arranged immediately above the same, is inserted in the'air path.

According to a further feature of the invention the guiding vanes are curved and so inserted in the leading or guiding member, that within this member, the flowing air receives a turning movement.

Further, the surfaces of the leading vanes can be so inclined towards the vertical that the air currents escaping from the guide member underneath receive a lead against that escaping above. Different methods of carrying out the invention ;are illustrated diagrammatically in the accompanying drawing, in which:

Figure 1 shows a longitudinal section through the apparatus according to the invention with passage of the air to be purified in an upward direction.

Figure 2 shows a plan of the guide member,

. and

The guide member 3 consistsin all forms of construction-of a plurality of guiding vanes or scoops which have the object of distributing the air as uniformly as possible over the whole circumference of 360 of the guide member outlet.

' In the lower part of the casing I, there is provided the liquid 5 serving to wash the dusty air. It is preferably at such'a level in the casing that the guide member as shown in' Figures 1 and 4 dips partially into the liquid. However the arrangement can be so chosen that the liquid completely covers the guide member, orthe liquid level can be immediately under the guide member (see Figure 6) without the mode of working of the apparatus being substantially affected. In

so far as the apparatus illustrated in Figure 6 is concerned, in which the liquid level lies below the guide member, it is advantageous to give the air in the guide member a direction insired intimate contact between liquid and air oc- V curs.

This mixing can be obtained to a still greater extent by so forming and inserting the blades or scoops 4 that the air on flowing through the guide member is given a strong rotary motion, as

is obvious from Figures 2 and 5, also Figures 3 I and 7. This motion is .then communicated to the 1 liquid which also acquires a strong circulatory motion. It is thereby driven by the flowing air against the walls 6 of the casing l where it forms a film providing extensive contact with the air. In this manner there occurs an extraordinarily intimate contact between liquid and dust-contaming ,air, which .afiord's as a consequence ainclined to the vertical that the air currents escaping at the bottom from the guidelmember 3 obtain a lead as compared "with those escaping at the top. This oblique position is more. I advantageous from a technical view point in the examples according to Figures 4 and 6, with air flowing in at the top than the vertical arrangement of the vanes or blades according to Figures 1 and 3. However there is nothing to prevent this oblique position of the vanes 4 also occurring in the example according to Figure 1 with air flowing in at the bottom.

,Ihe wall 6 of the casing I of the apparatus f f has approximately the form of half an ellipsoid of rotation. By this very favourable shape it is ensured that the liquid climbs tothe upper edge 1 of the casing. The wall 6 is thus continuously coveredginwardly frombottom to top,.with a liquid layer, which is kept insteady motion by the flow of the air. By this layer the washed out dust particles or those centrifuged out by centhe dead space M, from which it passes into the pureai'r pipe I2 arranged in the cover hood II,

which pipe leads the air to the place of use;

The apparatus according to the invention can be used with special advantage where it is a question of freeing very impure air from suspended particles, for example; for the cleaning of air drawn from grinding machines, the cleaning ing, upper and lower guide members in said housing arranged to impart a substantially horizontal direction of flow to the entire air to be purified, said guide members being substantially parallel to each other and the lower of said members beingin the form of a closed bottom, and a plurality of vanes arranged between said guide members to impart a rotating direction of flow tothe air passing between said guide members, .said vanes being essentially greater in diameter than the distance of said guide members from each other and the walls of saidhousing being curved and enlarged at least in the region of and above said guide members and above said liquid bath, said vanes extending almost to said curved and enlarged walls.

2. Apparatus for purifying airand other'gases,

7 comprising a housing, a liquid bath in 'said'housing", upper and lowerguide members arranged to imparta substantially horizontal direction of trifugal force, aretaken up and fixed. The upper edge 1 of the Wall'6 isformed as a trap ring to limit the height of climb of the liquid to this P int, 9

The thoroughly washed and cleaned air finally passes to a'filter insert 8, in which it undergoes a subsequent purification, As filter medium for the insert can be used-one of the known suitable materials forrthis purpose, such as perforated plates, fabrics, ring bodies etc. The examples according to Figures 1 and 4, show an insert 8 having the form of a conical fr'ustum. It can of course, 'be formed in any other way, e. g, as a cylinder, or as illustrated in Figure 6, a disc.

. Between the filter insert 8 and the wall 6 of the casing I is further arranged a damping grating 9,

which has the function of converting the cir-, culatory motion of the air 'which has been given to it by the guide member into straight line motion again, and to keep thegreater part of the How to the auto be purified, said guide members Jtion of flow to the air passing between saidjguide members, the walls of said housing being'curved at least in the region of and'above said guide members and said vanes extending almost to said curved walls. 4 y

3. Apparatus for purifying air and other gases, comprising ahousing with curved \val1s,"aliquid bath in, said housing, upper and lower guide members arranged to impart a substantially hori- ,zontal'direction of fiow to the airgto be purified, said guide members being substantially parallel to each other and to the surface of said liquid bath, and the lower of said members being in the form of a closed bottom, a plurality of vanes arranged between said guide members to impart a rotating direction of flow to the air passing betweensaid'guide members, said curved housing wallsextending almost to said vanes, and a damping grating in the form of a truncated cone and exte'ndih'gf'rom the outlet of Said vanes along the upper portioh'of the housing walls.

' v WILLY NEUMANN'. 

